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Qualcomm brought more stability to Quick Charge 3.0. We didn't really see much of a speed increase as the update to 3.0 was more about enhancing the battery longevity over time while using quick charge. QC3.0 was designed to bring less wear and tear to the battery. It looks like Qualcomm will be focusing on bringing more speed to charging in QC4.0. According to "Fudzilla" QC4.0 will be the most powerful fast charging solution ever. Apparently it will feature 5V charging at 5.6A which means you will be charging at 28W worth of power. There may also be an option to charge at 9V/4A doubling current QC power to 36W. It would be great to see phones charge fully in less than an hour. This technology might make this a reality.
via Fudzilla